JP2015020651A - Vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically secure a predetermined power storage amount and more in a retention mode of retaining a power storage amount of a power storage device.SOLUTION: A hybrid automobile includes an engine, a power storage device, a motor generator which can be driven by power stored in the power storage device, and an SOC retention switch. An ECU carries out first SOC retention control for retaining a current SOC when the current SOC is larger than a retention target lower limit value A when the ECU controls the power storage amount (SOC) of the power storage device in an SOC retention mode in response to operation of the SOC retention switch. On the other hand, when the current SOC is smaller than the retention target lower limit value A, second SOC retention control for restoring the SOC to the retention target lower value A is carried out.

Description

  The present invention relates to a vehicle capable of traveling with the output of at least one of an engine and a motor generator.

  Japanese Patent Laying-Open No. 2011-219093 (Patent Document 1) discloses a hybrid vehicle including an engine, a battery, a motor generator that can be driven by electric power stored in the battery, and a charge priority button. The hybrid vehicle travels in the quick charge travel mode when the charge priority button is turned on. In the quick charge traveling mode, the engine is operated to drive and the motor generator is controlled to generate power, and the battery is rapidly charged to recover the stored amount of battery (hereinafter also referred to as “SOC”).

JP 2011-219039 A

  The quick charge traveling mode disclosed in Patent Document 1 is a mode (hereinafter also referred to as “SOC recovery mode”) in which control is performed to recover the SOC from its current value in preparation for future power use.

  As a mode similar to the SOC recovery mode, a mode for performing control for holding the SOC at the current value in preparation for future power use (hereinafter also referred to as “SOC holding mode”) can be considered. However, if the SOC is kept as it is when the SOC when switching to the SOC holding mode is low, there is a possibility that the power will be insufficient when the power is used thereafter. For example, there is a possibility that even if the user selects the SOC holding mode for the purpose of performing motor traveling using electric power in the future, the electric power is insufficient and the motor traveling cannot be performed sufficiently.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to automatically secure a storage amount that is equal to or greater than a predetermined amount in a holding mode for storing a storage amount of a power storage device. .

  A vehicle according to the present invention is a vehicle that can travel with the output of at least one of an engine and a motor generator, a power storage device that can transfer power to and from the motor generator, and a holding mode that holds a power storage amount of the power storage device A holding switch that outputs a signal requesting the power supply according to a user's operation, and a control device that can control the amount of charge. When the storage device controls the storage amount in the holding mode according to the output signal of the holding switch, the control device performs the first holding control for holding the storage amount at the current value when the storage amount is larger than the threshold value. When the charged amount is smaller than the threshold value, the second holding control for recovering the charged amount from the current value is performed.

  Preferably, when performing the second holding control, the control device allows regenerative power generation by the motor generator using the kinetic energy of the vehicle, and prohibits power generation by the motor generator using the output of the engine.

  Preferably, the second holding control is control for recovering the charged amount to the first target value. The vehicle further includes a recovery switch that outputs a signal requesting a recovery mode for recovering the amount of stored electricity in response to a user operation. When the storage device controls the storage amount in the recovery mode according to the output signal of the recovery switch, the control device performs recovery control for recovering the storage amount to a second target value that is larger than the first target value.

  Preferably, the first holding control includes control for limiting the discharge power of the power storage device more than when the holding mode is not set and the recovery mode is not set. The second holding control includes control for increasing the charging power of the power storage device while limiting the discharging power of the power storage device more than in the holding mode and not in the recovery mode until the amount of power storage is restored to the first target value. The recovery control includes a control for increasing the charging power of the power storage device while limiting the discharge power of the power storage device until the amount of power storage reaches the second target value, as compared to when the power storage device is not in the holding mode and is not in the recovery mode.

  Preferably, the vehicle can be switched between hybrid travel that travels using the outputs of both the engine and the motor generator, and motor travel that travels using the output of the motor generator with the engine stopped. The first holding control includes a control for restricting switching to motor travel as compared to when the holding mode is not set and the recovery mode is not set. The second holding control includes control for prohibiting switching to motor travel until the amount of stored electricity is restored to the first target value. The recovery control includes control for prohibiting switching to motor travel until the amount of stored electricity reaches the second target value.

  According to the present invention, it is possible to automatically ensure a storage amount that is equal to or greater than a predetermined amount in the holding mode that holds the storage amount of the power storage device.

1 is an overall block diagram (part 1) of a vehicle. It is a flowchart (the 1) which shows the process sequence of ECU. It is a figure which shows typically the change aspect of SOC in SOC holding | maintenance mode. FIG. 3 is an overall block diagram (part 2) of the vehicle. It is a flowchart (the 2) which shows the process sequence of ECU. It is the figure which contrasted the recovery target value B in SOC recovery mode, and the retention target lower limit A in SOC retention mode. It is a flowchart (the 3) which shows the process sequence of ECU. FIG. 3 is an overall block diagram (part 3) of the vehicle.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  In this specification, the term “electric power” may mean electric power (work rate) in a narrow sense, and may mean electric energy (work amount) or electric energy, which is electric power in a broad sense, and the term is used. It is interpreted elastically according to the situation to be done.

[Embodiment 1]
FIG. 1 is an overall block diagram of a vehicle 1 according to the present embodiment. Vehicle 1 includes an engine 100, a motor generator MG, a PCU (Power Control Unit) 600, a power storage device BAT, and an ECU (Electronic Control Unit) 1000.

  Vehicle 1 is a hybrid vehicle that travels by rotating drive wheels 82 with the output of at least one of engine 100 and motor generator MG.

  The power generated by the engine 100 is transmitted to the drive shaft 560 connected to the drive wheels 82 via the clutch 110.

  Motor generator MG is an AC rotating electric machine, and typically includes a three-phase (U, V, W phase) permanent magnet type synchronous motor. Motor generator MG functions as both a motor and a generator. The rotor of motor generator MG is directly connected to drive shaft 560.

  PCU 600 converts the DC power supplied from power storage device BAT into AC power and outputs the AC power to motor generator MG. Thereby, motor generator MG is driven. PCU 600 converts AC power generated by motor generator MG into DC power and outputs the DC power to power storage device BAT. Thereby, power storage device BAT is charged. PCU 600 includes a converter that performs voltage conversion and an inverter that performs power conversion.

  Power storage device BAT stores DC power for driving motor generator MG. The power storage device BAT typically includes nickel metal hydride and lithium ions.

  In the vehicle 1 according to the present embodiment, any one of motor travel, engine power generation travel, hybrid travel, and engine travel is possible. In motor running, the engine 100 is stopped and the drive shaft 560 is rotated using the output of the motor generator MG to run the vehicle 1. In the engine power generation travel, the vehicle 1 is traveled by rotating the drive shaft 560 while generating power with the motor generator MG using the output of the engine 100. In hybrid travel, the vehicle 1 is traveled by rotating the drive shaft 560 with the outputs of both the engine 100 and the motor generator MG. In engine travel, the motor generator MG is stopped and the drive shaft 560 is rotated by the power of the engine 100 to travel the vehicle 1. Note that the clutch 110 is disengaged in motor travel, and the clutch 110 is engaged in other travel.

  The vehicle 1 includes a vehicle speed sensor 15, a resolver 22, and a monitoring sensor 32. The vehicle speed sensor 15 detects the rotational speed Np of the drive shaft 560 as the vehicle speed V. Resolver 22 detects rotation speed Nm of motor generator MG. Monitoring sensor 32 detects the state (voltage Vb, current Ib, temperature Tb, etc.) of power storage device BAT. Each of these sensors outputs a detection result to ECU 1000.

  Further, the vehicle 1 is provided with an SOC holding switch 10. The SOC holding switch 10 outputs a signal requesting a mode (hereinafter referred to as “SOC holding mode”) for holding the charged amount (State Of Charge, hereinafter referred to as “SOC”) of the power storage device BAT in accordance with a user operation. To do. In the following, SOC is expressed as a percentage where the maximum capacity is 100%.

  ECU 1000 incorporates a CPU (Central Processing Unit) (not shown) and a memory, and executes predetermined arithmetic processing based on information stored in the memory and information from each sensor. ECU 1000 controls each device mounted on vehicle 1 based on the result of the arithmetic processing.

  ECU 1000 calculates the SOC of power storage device BAT based on the detection result of monitoring sensor 32. As a calculation method of the SOC, various known methods such as a method of calculating using the relationship between the open circuit voltage (OCV) of the power storage device BAT and the SOC and a method of calculating using the integrated value of the current Ib are used. be able to.

  ECU 1000 sets dischargeable power WOUT and chargeable power WIN (in units of watts) of power storage device BAT based on the SOC and temperature Tb of power storage device BAT. ECU 1000 calculates required discharge power or required charge power of power storage device BAT based on the amount of accelerator operation by the user and vehicle speed V. ECU 1000 controls PCU 600 so that actual discharge power Pout or actual charge power Pin of power storage device BAT becomes the required discharge power or required charge power of power storage device BAT. At this time, the actual discharge power Pout is limited so as not to exceed the dischargeable power WOUT. In addition, the actual received power Pin is limited so as not to exceed the chargeable power WIN.

  ECU 1000 switches the mode for controlling the SOC of power storage device BAT (hereinafter referred to as “SOC control mode”) to either the normal mode or the SOC holding mode. When SOC holding switch 10 is pressed during the normal mode, ECU 1000 switches the SOC control mode to the SOC holding mode. When the SOC holding switch 10 is pressed during the SOC holding mode, the ECU 1000 cancels the SOC holding mode and returns to the normal mode.

  In the vehicle 1 having the above-described configuration, the ECU 1000 performs control (hereinafter referred to as “SOC holding control”) for holding the SOC in preparation for future power use in the SOC holding mode. However, when the SOC at the time of starting the SOC holding control is low and the low SOC is held as it is, there is a possibility that the power is insufficient when the power is used thereafter. For example, even if the user presses the SOC holding switch 10 in preparation for future motor travel, there is a possibility that the travelable distance by motor travel cannot be secured sufficiently.

  Therefore, ECU 1000 according to the present embodiment is in the SOC holding mode, and when the current SOC is larger than holding target lower limit A, the holding control for holding the current SOC (hereinafter referred to as “first SOC holding control”). Do). On the other hand, when the current SOC is smaller than the holding target lower limit value A, holding control for recovering the SOC to the holding target lower limit value A (hereinafter referred to as “second SOC holding control”) is performed.

  FIG. 2 is a flowchart showing a processing procedure when ECU 1000 performs SOC holding control. This flowchart is repeatedly executed at a predetermined cycle.

  In step (hereinafter, step is abbreviated as “S”) 10, ECU 1000 determines whether or not it is in the SOC holding mode. If not in the SOC holding mode (NO in S10), that is, if in the normal mode, ECU 1000 ends the process.

  When in the SOC holding mode (YES in S10), ECU 1000 determines whether or not the current SOC is larger than holding target lower limit value A (S11). In the present embodiment, the user can arbitrarily select the holding target lower limit value A within a predetermined range (for example, a range of 30% to 50%) by operating an input device (not shown). is there. The holding target lower limit value A may be a fixed value (for example, 40%).

  If the current SOC is larger than holding target lower limit A (YES in S11), ECU 1000 performs a first SOC holding control for holding the current SOC (S12). In the present embodiment, as the first SOC retention control, control for limiting actual discharge power Pout of power storage device BAT as compared with that in the normal mode and control for limiting switching to motor travel as compared with that in the normal mode are performed. As a result, the SOC is less likely to be consumed than in the normal mode, and the current SOC is easily maintained. As a method for limiting the actual discharge power Pout, for example, at least one of the required discharge power and the dischargeable power WOUT may be reduced as compared with that in the normal mode. Further, as a method for restricting switching to motor traveling, for example, the condition for switching to motor traveling may be made stricter than in the normal mode.

  On the other hand, when the current SOC is smaller than holding target lower limit value A (NO in S11), ECU 1000 performs the second SOC holding control for recovering the SOC to holding target lower limit value A (S13). In the present embodiment, as the second SOC holding control, control for limiting actual discharge power Pout of power storage device BAT as compared with that in the normal mode, control for increasing actual charge power Pin of power storage device BAT as compared with that in the normal mode, motor Control for prohibiting switching to traveling is performed. As a result, the SOC is less likely to be consumed than during the first SOC control, and the amount of power charged in power storage device BAT is increased, so that the recovery of the SOC is promoted. As a method for increasing the actual charging power Pin, for example, at least one of the required charging power and the chargeable power WIN may be increased as compared with that in the normal mode.

  FIG. 3 is a diagram schematically showing the SOC change mode during the SOC holding mode. In the description of FIG. 3, it is assumed that the user switches to the SOC holding mode by pressing the SOC holding switch 10 at time t1 in preparation for future motor travel.

  In this case, as indicated by the one-dot chain line L1, when the SOC at time t1 is larger than the retention target lower limit value A, the SOC is retained at the value at time t1 by the first SOC retention control. Therefore, when the motor travels after consuming the SOC, it is longer than the distance corresponding to the retention target lower limit value A (that is, the travelable distance when performing the motor travel while consuming the retention target lower limit value A). The distance can be motored.

  On the other hand, as shown by the solid line L2, when the SOC at time t1 is smaller than the retention target lower limit value A, the SOC is first increased (recovered) from the value at time t1 by the second SOC retention control. Then, at the time t2 when the SOC is recovered to the retention target lower limit value A, the second SOC retention control is switched to the first SOC control. Therefore, after time t2, the SOC is held at the holding target lower limit A. As a result, when the motor travels while consuming the SOC thereafter, the motor travels at least the distance corresponding to the retention target lower limit value A.

  As described above, ECU 1000 according to the present embodiment, when in the SOC holding mode, holds the current SOC by the first SOC holding control when the current SOC is larger than holding target lower limit A, and the current SOC is When it is smaller than the holding target lower limit value A, the SOC is automatically recovered to the holding target lower limit value A by the second SOC holding control and held at the holding target lower limit value A. Therefore, in the SOC holding mode, it is possible to automatically ensure an SOC that is equal to or higher than the holding target lower limit value A. Thereby, it is possible to avoid a shortage of power when the power is subsequently used.

  In particular, in the present embodiment, the user can arbitrarily select the holding target lower limit value A. Therefore, the user himself / herself can adjust the SOC secured in the SOC holding mode in accordance with the amount of electric power that is predicted to be required after the SOC holding mode (for example, the distance that the user wants to travel by motor traveling).

  In the present embodiment, in the SOC holding mode, the SOC value that switches between the first SOC holding control and the second SOC holding control and the SOC value that is recovered by the second SOC holding control are the same as the “holding target lower limit value A”. However, both may be set to different values. For example, one of the first SOC holding control and the second SOC holding control is selected according to whether or not the SOC at the start of the SOC holding mode is larger than the holding target lower limit value A, and the SOC is recovered when the second SOC holding control is selected. The target value may be a value larger or smaller than the retention target lower limit value A.

[Embodiment 2]
FIG. 4 is an overall block diagram of the vehicle 1A according to the second embodiment. The vehicle 1A has an SOC recovery switch 20 added to the vehicle 1 according to the first embodiment. That is, the vehicle 1A according to the second embodiment includes the SOC recovery switch 20 in addition to the SOC holding switch 10. Since other hardware configurations are the same as those of the first embodiment, detailed description thereof will not be repeated here.

  The SOC recovery switch 20 outputs a signal requesting a mode for recovering the SOC (hereinafter referred to as “SOC recovery mode”) according to a user operation.

  ECU 1000 switches the SOC control mode to one of the normal mode, the SOC holding mode, and the SOC recovery mode.

  When the SOC holding switch 10 is pressed during a mode other than the SOC holding mode (normal mode or SOC recovery mode), the ECU 1000 switches the SOC control mode to the SOC holding mode. On the other hand, when SOC holding switch 10 is pressed during the SOC holding mode, ECU 1000 cancels the SOC holding mode and returns to the normal mode.

  When the SOC recovery switch 20 is pressed during a mode other than the SOC recovery mode (normal mode or SOC holding mode), the ECU 1000 switches the SOC control mode to the SOC recovery mode. On the other hand, when SOC recovery switch 20 is pressed during the SOC recovery mode, ECU 1000 cancels the SOC recovery mode and returns to the normal mode. ECU 1000 also cancels the SOC recovery mode and returns to the normal mode when the SOC recovers to a recovery target value B, which will be described later, in the SOC recovery mode.

  The above-described SOC control mode switching method is merely an example, and the present invention is not limited to this. For example, even if the SOC holding switch 10 is pressed during the SOC recovery mode, the SOC recovery mode may be maintained with priority given to the SOC recovery mode. Further, when switching from the SOC holding mode to the SOC recovery mode, when the SOC recovery switch 20 is pressed again, the original SOC holding mode may be restored.

  In vehicle 1A having the above-described configuration, ECU 1000 performs the SOC holding control (first SOC holding control or second SOC holding control) described in the first embodiment when in the SOC holding mode. In addition, when in the SOC recovery mode, ECU 1000 performs control (hereinafter referred to as “SOC recovery control”) for recovering the SOC in preparation for future power use.

  FIG. 5 is a flowchart showing a processing procedure when ECU 1000 performs SOC holding control or SOC recovery control.

  ECU 1000 determines whether or not it is in the SOC holding mode (S10). When in the SOC holding mode (YES in S10), ECU 1000 performs SOC holding control in S11 to S13. Note that the processing contents of S11 to S13 are the same as the processing contents of S11 to S13 shown in FIG. 2 described above, and thus detailed description thereof will not be repeated here.

  On the other hand, when not in the SOC holding mode (NO in S10), ECU 1000 determines whether or not it is in the SOC recovery mode (S20). If not in the SOC recovery mode (NO in S20), that is, in the normal mode, ECU 1000 ends the process.

  When in the SOC recovery mode (YES in S20), ECU 1000 determines whether or not the current SOC is larger than recovery target value B (S21). In the present embodiment, recovery target value B is a fixed value (for example, 70%) that is larger than retention target lower limit A. In addition, the value of the recovery target value B may be arbitrarily selected within a predetermined range (for example, a range of 60% to 80%) by a user operating an input device (not shown). In any case, the recovery target value B is set to a value larger than the retention target lower limit value A.

  When the current SOC is smaller than recovery target value B (NO in S21), ECU 1000 performs SOC recovery control for recovering SOC to recovery target value B (S22). In the present embodiment, the SOC recovery control (the process of S22) is different from the above-described second SOC retention control (the process of S13) in the SOC recovery target value (see FIG. 6 described later). The processing contents are the same. That is, the ECU 1000 performs, as SOC recovery control, control for limiting the actual discharge power Pout of the power storage device BAT as compared with that in the normal mode, control for increasing the actual charge power Pin of the power storage device BAT than in the normal mode, Control to prohibit switching. Note that the processing content may be different between the SOC recovery control and the second SOC holding control described above. For example, in the SOC recovery control, in order to recover the SOC earlier than in the second SOC holding control, the increase amount of the actual charging power Pin during the SOC recovery control is set to be larger than the increase amount of the actual charging power Pin during the second SOC holding control. You may make it set to a big value.

  On the other hand, when the current SOC is larger than recovery target value B (YES in S21), ECU 1000 ends the process. The case where the current SOC is larger than the recovery target value B means that when the SOC at the time of switching to the SOC recovery mode has already exceeded the recovery target value B, the SOC reaches the recovery target value B in the SOC recovery mode. Both cases of recovery are included.

  FIG. 6 is a diagram comparing the recovery target value B in the SOC recovery mode and the retention target lower limit value A in the SOC retention mode.

  The SOC recovery mode is a mode for recovering the SOC from the current value even if the fuel of the engine 100 is consumed in preparation for future power use (for example, motor running). On the other hand, the SOC holding mode is a mode for holding the SOC at the current value in principle. Thus, the purpose of the SOC recovery mode and the purpose of the SOC holding mode are different from each other.

  Corresponding to such a difference in purpose, a target value for recovering the SOC in each mode is set. That is, the target value for recovering the SOC in the SOC recovery mode is set to a relatively large “recovery target value B” (for example, 70%). Thereby, when using electric power after that, sufficient electric energy can be ensured.

  On the other hand, the target value for recovering the SOC in the SOC holding mode is “holding target lower limit value A” (for example, 40%) smaller than the recovery target value B. By doing so, in the SOC holding mode, it is possible to prevent the fuel consumption from deteriorating due to excessive consumption of the fuel of the engine 100 for securing the SOC while securing the necessary SOC.

  As described above, in the present embodiment, the target value for recovering the SOC in the SOC holding mode is set to a value lower than the target value for recovering the SOC in the SOC recovery mode. As a result, a sufficient amount of electric power can be secured in the SOC recovery mode, and excessive engine fuel consumption can be suppressed while securing the required SOC in the SOC retention mode.

<Modification 1 of Embodiments 1 and 2>
In the first and second embodiments described above, when the SOC is recovered in the SOC holding mode, regenerative charging at the time of vehicle deceleration (charging of power storage device BAT by electric power regenerated by motor generator MG using the kinetic energy of the vehicle is used. ) May be permitted, and charging at the time of engine output (charging of power storage device BAT by electric power generated by motor generator MG using the output of engine 100) may be prohibited.

  FIG. 7 is a flowchart showing an example of a processing procedure of ECU 1000 when the present modification is applied to the above-described first embodiment. This flowchart is obtained by adding the process of S13a to the flowchart shown in FIG. 2 described in the first embodiment.

  When performing the second SOC holding control in S13, ECU 1000 allows only regenerative charging during vehicle deceleration and prohibits charging during engine output (S13a).

  By doing so, in the SOC holding mode, the charging opportunity is limited to when the vehicle is decelerated (when the engine output is 0), so the time required to recover the SOC to the holding target lower limit value A becomes longer. Further, since the SOC can be recovered without consuming the fuel of the engine 100, fuel consumption deterioration can be suppressed.

  In the process of S13a, the amount of charge at the time of engine output (the amount of increase in engine output for power generation) may be made smaller than that in the normal mode. Even in this case, the time required to recover the SOC to the retention target lower limit value A becomes longer, but the engine load during traveling decreases, and deterioration of fuel consumption can be suppressed.

<Modification 2 of Embodiments 1 and 2>
In the first and second embodiments described above, the case where the present invention is applied to a hybrid vehicle in which an engine and one motor generator are connected in series has been described. However, a vehicle to which the present invention can be applied has such a structure. Not limited to hybrid vehicles.

  For example, as shown in FIG. 8, the present invention can also be applied to a hybrid vehicle in which an engine and two motor generators MG1 and MG2 are connected by a power split mechanism formed of planetary gears.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 vehicle, 10 holding switch, 20 recovery switch, 100 engine, 110 clutch, 600 PCU, 1000 ECU, 560 drive shaft, BAT power storage device, MG motor generator.

Claims (5)

A vehicle capable of traveling with at least one output of an engine and a motor generator,
A power storage device capable of transferring power to and from the motor generator;
A holding switch that outputs a signal for requesting a holding mode for holding a storage amount of the power storage device according to a user operation;
A control device capable of controlling the amount of electricity stored,
The control device controls the storage amount in the holding mode according to an output signal of the holding switch, and holds the storage amount at a current value when the storage amount is greater than a threshold value. A vehicle that performs first holding control and performs second holding control for recovering the charged amount from a current value when the charged amount is smaller than the threshold value.   When performing the second holding control, the control device allows regenerative power generation by the motor generator using the kinetic energy of the vehicle, and prohibits power generation by the motor generator using the output of the engine. The vehicle according to claim 1. The second holding control is control for recovering the charged amount to a first target value,
The vehicle further includes a recovery switch that outputs a signal requesting a recovery mode for recovering the charged amount in response to a user operation,
The control device performs recovery control for recovering the power storage amount to a second target value larger than the first target value when the power storage amount is controlled in the recovery mode according to an output signal of the recovery switch. The vehicle according to claim 1, wherein the vehicle is performed. The first holding control includes control for limiting the discharge power of the power storage device more than when not in the holding mode and in the recovery mode;
The second holding control is configured to limit the discharging power of the power storage device while not in the holding mode and when not in the recovery mode, until the amount of power storage recovers to the first target value. Including control to increase
The recovery control increases the charge power of the power storage device while limiting the discharge power of the power storage device more than in the holding mode and not in the recovery mode until the power storage amount reaches the second target value. 4. The vehicle according to claim 3, comprising control. The vehicle is capable of switching between hybrid travel that travels using the outputs of both the engine and the motor generator and motor travel that travels using the output of the motor generator with the engine stopped.
The first holding control includes a control for restricting switching to the motor running as compared to when not in the holding mode and not in the recovery mode;
The second holding control includes a control for prohibiting switching to the motor running until the charged amount recovers to the first target value.
4. The vehicle according to claim 3, wherein the recovery control includes control for prohibiting switching to the motor travel until the charged amount reaches the second target value. 5.

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